湖南植烟土壤盐分及其表聚特征研究  

On Total Salt Amount and Salt Accumulation in Surface Soil in Tobacco Fields in Hunan

作　　者：石丽红[1] 罗建新[1] 向鹏华[1] 赵莉[1] 黄海龙[1] 

机构地区：[1]湖南农业大学资源环境学院,长沙410128

出　　处：《土壤》2008年第4期612-615,共4页Soils

基　　金：国家烟草专卖局项目(2006-1-31)资助

摘　　要：对湖南主要植烟区表层土壤总盐及主要盐分离子的组成进行了分析。结果表明:烟叶收获后,植烟土壤盐分表聚现象严重,表层土壤总盐量达4.17g/kg,与强度盐化土相当。烟-稻轮作土壤盐分表聚明显强于旱地烟土壤,同时,在烟-稻轮作区又以衡阳土壤盐分含量最高,永州和郴州其次;烟-稻轮作区植烟土壤表层盐分离子以NO3-、SO42-、Ca2+和K+为主,占总盐量的95.21%。Surface soils of tobacco fields in Hunan Province were collected to analyze total salt concentrations and composition of ions. The results showed that a remarkable salt accumulation occured in surface soils after tobacco leaves were harvested. Total salt concentration reached up to 4.17 g/kg, near the intensely salinized soil. Higher salt accumulation in surface soil occured in tobacco-rice rotation than in tobacco dryland. Moreover, the highest total salt amount of surface soil in tobacco-rice rotation fields happened in Hengyang, and followed by Yongzhou and Chenzhou. In addition, NO3^-, SO4^2-, Ca^2＋ and K^＋ consisted of main ions in surface soils in the tobacco-rice rotation fields, which accounted for 95,21% of total salt amount.

关 键 词：湖南 植烟土壤 总盐 盐分表聚 盐分离子组成 

分 类 号：S158[农业科学—土壤学] S159.2[农业科学—农业基础科学]